X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/7f26d744d3e443d08cb485b543f30513f7da3469..56b8ebe99bfcd666e373069b2072291ab5e04ee8:/src/smpi/colls/allgather-3dmesh.c

diff --git a/src/smpi/colls/allgather-3dmesh.c b/src/smpi/colls/allgather-3dmesh.c
index 5a224379c9..c83fdc6a3c 100644
--- a/src/smpi/colls/allgather-3dmesh.c
+++ b/src/smpi/colls/allgather-3dmesh.c
@@ -103,7 +103,9 @@ int smpi_coll_tuned_allgather_3dmesh(void *send_buff, int send_count,
   num_procs = smpi_comm_size(comm);
   extent = smpi_datatype_get_extent(send_type);
 
-  is_3dmesh(num_procs, &X, &Y, &Z);
+  if (!is_3dmesh(num_procs, &X, &Y, &Z))
+    THROWF(arg_error,0, "allgather_3dmesh algorithm can't be used with this number of processes! ");
+
 
   num_reqs = X;